Pump stirrup



C. D. BRANDT.

PUMP STIRRUP.

APPLICATION man APR.3. I920.

Patented Mar. 7, 1922.

aMmunB/M/vfl ATTORNEYS WITNESSES $0M ENT OFFICE.

CHARLES D. BRANDT, OF NEW YORK, N. Y.

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Application filed April 3,

To all whom it may concern:

Be it known that 1, CHARLES D. BRANDT, a citizen of the United States,and a resident of Richmond Hill, borough and countyof Queens, city andState of New York, have invented certain new and useful Improve ments inPump Stirrups, of which the following is a specification.

My invention relates to pumps and more particularly to air pumps forinflating pneumatic tires and the like and has for its object to providea folding stirruparrangement in which the stirrups are pivotally mountedand secured in position in a novel and efficient manner and in which theneces sity for drilling and drill-holes is avoided. My invention will befully described hereinafter and the features of novelty will be pointedout in the appended clain For illustrative and descriptive purposes, aspecific embodiment of my invention is shown in the accompanyingdrawings in which Fig. 1 is an elevation; Fig. 2 is .a vertical sectionon the line 2-2 of Fig. 1; Fig. 3 is a horizontal section on the line3-3 of Fig. 2; and Fig. l is an inverted plan view with the stirrupsomitted.

The pump itself may be of any well known and customaryconstruction and,as shown, comprises the usual barrel 5 in which the piston isreciprocated, by means or" a suitable piston rod and handle, in anyrecognizedmanner, these latter parts being omitted as unnecessary to theproper illustration of the invention. The pump further is provided withthe usual connection 6 for the detachable accommodation of the customaryflexible hose whereby the pump is operatively connected with thepneumatic tire or other element to be inflated. As is generallycustomary, the one end of the barrel 5 is fitted and secured in a baseor cap 7 with the in terior of which the connection 6 is in com--munication.

In the present instance this cap 7 is con tinued in an axial directionin the form of a neck 8 which is constructed with a main recess 9extending diametrically through said neck 8 and in an axial direction asshownin Fig. 2. Auxiliary recesses 10 extend in co-related pairs inopposite directions toward the axis of the pump at intermediate portionsof said neck and communicate with the main recess 9 as shown in Figs. 1and 3. The outer ends of said auxiliary recesses 10 are open andinterrupt Specification of Letters Patent.

Patented Mar. '7, 1922. 1920. Serial No. 370,961.

the periphery of said neck, while the inner ends thereof are closed, theinward length of said auxiliary recesses 10 from said periphery beingpredetermined as will be more fully described hereinafter. i v

The construction further includes stirrupmembers 11 and 12 having footrests l3 and toothed segments 14 arranged to mesh together, as shown inFig.2. The stirrup membersll and 12 are each provided with trunnions l5arranged in diametrically opposite pairs on each stirrup member-andpreferably forming integral parts thereof. In the assembled condition ofthe parts these trunnions are seated in the auxiliary re cesses l0 andconstitute the pivots .upon which the stirrup members 11 and .12 areswung to and from their operative andinoperative positions. The stirrupmembers 11 and 12 are accommodated, in the main recess 9, which has atransverse width just suiticient to avoid interference with the pivotalmovements of said members and to prevent undue vibration thereof, saidfoot rests 13 being located exteriorlyot the main recess 9 as shown. Thetrunnions 15 are dimensioned to fit the auxiliary recesses 10 withoutunnecessary looseness and the inward length of the latter is such as toprovide for the proper meshing ot' the toothed segments 14 the inner encs of said auxiliary recesses 10 being located so as to constituteeflicient bearings for said trunnions. The means whereby the stirrupmembers 11 and .12 are maintained in position and the trunnions l5.areheld againstunintentional removal from the auxiliary recesses 10, asshownin the drawings, comprise projections 16 cast or otherwise formedon the neck 8 and comprising integral extensions thereof. Theseextensions or projections 16 are located in registry with the auxiliaryrecesses 10 at the outer closed ends thereof and in their initialcondition occupy the positions shown in Fig. 4.

In assembling the parts the stirrup members 11 and 12 are inserted intothe main recess 9 from opposite sides of the neck 8, with the trunnions15 in registry with the auxiliary recesses 10 and moving inwardly in thesame, until the toothed segments let are in proper mesh; this operationis preterably carried out with the foot rest-s in their operativepositions.

The extensions 16 are then bent inwardly at approximately right anglesto their ini tial positions and so as to close theouter ioo ends of theauxiliary recesses and rest' against or engage the trunnions as shown inFig. 3. The latter are thus secured The foot rests 13 and with them thestirrup members 11 and 12 may now be pivotally swung on the trunni'ons15 to and from their operative and inoperative positions, theco-operation of the extensions 16 and the trunnions 15 preventing unduev1- bration of said stirrup members and foot rests during suchmovements. When the stirrup members 11 and 12 are in their operativepositions, the foot rests 13 extend in opposite directions, in registrywith each other and may thus be placed upon a floor, roadway or the liketo provide rests for the feet wherebythe pump is held in placeagainstupward movement when in use. In the inoperative positions of thestirrup members 11 and 12 the extensionslG lie within pockets 17 withwhich the stirrup members 11 and 12 are provided while the foot. rests13 extend lengthwise of the barrel 5 and close thereto so as to occupy aminimum of spaceand to provide a compact arrangement in the foldedcondition of the parts. i

To dis-assemble the parts it is simply nec essary to bend the extensions16 back to the positions shown in Fig. 1 after which the trunnions 15are free to be removed from the auxiliary recesses 10.

The invention reduces the means for maintaining the parts in operativecombination to the simplest form and thus reduces the cost of productionto a minimum and at the same time eliminates to a great extent thepossibility of dis-arranging the parts.

The improved construction further does away with machining of the partsand avoids the necessity for drilling rivet or pinholes thus also doingaway with the use of rivets or pins which, under the strains incioutinterference dent to use, are likely to work loose and thereby reducethe efiiciency of the pump as a mechanical structure. The recesses, mainand auxiliary, are easily cut or otherwise produced in the neck, whilethe trunnions are readily fashioned upon the stirrup members thusreducing the selling price to a minimum and increasing the field ofusefulness of the pump by making it available to a greater number ofusers because of its low cost.

The parts are quickly assembled and as quickly disassembled, whereby thecost of repairs and upkeep is maintained at a low figure.

Various changes in the form shown and described may be made within thescope of the claim without departing from the spirit of my invention.

I claim:

The combination of an air pump having a base at one end provided with anaxially extending main recess and transverse auxiliary recesses arrangedin co-operating pairs at opposite sides ofsaid main recess andcommunicating therewith, said auxiliary recesses being openat theirouter ends, stirrup-members located in said main recess and between eachpair of auxiliary recesses and beingmovable to and from an operativeposition, trunnions on said stirrup-members extending into saidauxiliary recesses and constituting pivots for said stirrup-memhers, andprojections comprising integral parts of said base and extending acrosssaid auxiliary recesses and lengthwise of said trunnions to formstationary, transverse walls whereby said auxiliary recesses areoutwardly closed and the trunnions are maintained in said auxiliaryrecesses with with their pivotal movemerits.

In testimony whereof I have hereunto set my hand.

CHARLES D. BRANDT.

